Regex Tester - Real-time Regular Expression Testing

Regular Expression

/ /

g i m s u

Test String

Pattern Explanation

Enter a regex pattern to see its breakdown

Match Results

0 matches

Matches will appear here

Cheat Sheet

Character Classes

. Any character (except newline)

\d Digit [0-9]

\D Not a digit

\w Word character [a-zA-Z0-9_]

\W Not a word character

\s Whitespace

\S Not whitespace

Anchors

^ Start of string/line

$ End of string/line

\b Word boundary

\B Not a word boundary

Quantifiers

* 0 or more

+ 1 or more

? 0 or 1 (optional)

{n} Exactly n

{n,} n or more

{n,m} Between n and m

*? Lazy (minimal match)

Groups & References

(abc) Capturing group

(?:abc) Non-capturing group

(?<name>abc) Named group

\1 Backreference

(?=abc) Positive lookahead

(?!abc) Negative lookahead

(?<=abc) Positive lookbehind

(?<!abc) Negative lookbehind

Sets & Alternation

[abc] Any of a, b, or c

[^abc] Not a, b, or c

[a-z] Range a to z

a|b a or b

Common Patterns

Email Email address

URL HTTP/HTTPS URL

IPv4 IP address

Hex Hex color code

Date YYYY-MM-DD

Phone Phone number